//   OData .NET Libraries
//   Copyright (c) Microsoft Corporation. All rights reserved.  
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at

//       http://www.apache.org/licenses/LICENSE-2.0

//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.

namespace Microsoft.OData.Core.UriParser.Parsers
{
    using Microsoft.OData.Core.UriParser.Syntactic;

    /// <summary>
    /// Interface for a class that can parse an identifier as a function and return a representitive QueryToken.
    /// </summary>
    internal interface IFunctionCallParser
    {
        /// <summary>
        /// Reference to the lexer.
        /// </summary>
        ExpressionLexer Lexer { get; }

        /// <summary>
        /// Parses an identifier that represents a function.
        /// </summary>
        /// <param name="parent">the syntactically bound parent of this identifier.</param>
        /// <returns>QueryToken representing this function.</returns>
        QueryToken ParseIdentifierAsFunction(QueryToken parent);
    }
}
